Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2004BAJA BASE, STANDARDREPAIR AND DIAGNOSISBRAKESANTI-LOCK BRAKESANTI-LOCK BRAKE CONTROL SYSTEM - VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
2004 Subaru Baja Base, Standard
Anti-Lock Brake Control System - Vehicle Dynamics Control (VDC) (Diagnostics)
2004 Subaru Baja Base, StandardSECTION Anti-Lock Brake Control System - Vehicle Dynamics Control (VDC) (Diagnostics)
- Basic Diagnostic Procedure
- Check List for Interview
- General Description
- Electrical Components Location
- Control Module I/O Signal
- VDCCM Connector Cover
- Subaru Select Monitor
- Read Diagnostic Trouble Code (DTC)
- Inspection Mode
- Clear Memory Mode
- Warning Light Illumination Pattern
- List of Diagnostic Trouble Code (DTC)
- Diagnostics Chart with Diagnosis Connector
- Notes
- Abs Warning Light, VDC Warning Light, VDC Operating Indicator Light Or VDC Off Indicator Light Does Not Come On
- Abs And VDC Warning Lights Do Not Go Off
- VDC Operating Indicator Light Does Not Go Off
- VDC Off Indicator Light Does Not Go Off
- Diagnostic Trouble Code (DTC) Does Not Appear
- DTC 21: Abnormal Abs Sensor (Open Circuit Or Input Voltage Too High) (Front RH)
- DTC 23: Abnormal Abs Sensor (Open Circuit Or Input Voltage Too High) (Front LH)
- DTC 25: Abnormal Abs Sensor (Open Circuit Or Input Voltage Too High) (Rear RH)
- DTC 27: Abnormal Abs Sensor (Open Circuit Or Input Voltage Too High) (Rear LH)
- DTC 22: Abnormal Abs Sensor (Abnormal Abs Sensor Signal) (Front RH)
- DTC 24: Abnormal Abs Sensor (Abnormal Abs Sensor Signal) (Front LH)
- DTC 26: Abnormal Abs Sensor (Abnormal Abs Sensor Signal) (Rear RH)
- DTC 28: Abnormal Abs Sensor (Abnormal Abs Sensor Signal) (Rear LH)
- DTC 29: Abnormal Abs Sensor Signal (Any One Of Four)
- DTC 31: Abnormal Inlet And Cut Solenoid Valve Circuit(S) (Front RH Inlet)
- DTC 33: Abnormal Inlet And Cut Solenoid Valve Circuit(S) (Front LH Inlet)
- DTC 35: Abnormal Inlet And Cut Solenoid Valve Circuit(S) (Rear RH Inlet)
- DTC 37: Abnormal Inlet And Cut Solenoid Valve Circuit(S) (Rear LH Inlet)
- DTC 61: Abnormal Inlet And Cut Solenoid Valve Circuit(S) (Primary Cut)
- DTC 62: Abnormal Inlet And Cut Solenoid Valve Circuit(S) (Secondary Cut)
- DTC 32: Abnormal Outlet And Suction Solenoid Valve Circuit(S) (Front RH Outlet)
- DTC 34: Abnormal Outlet And Suction Solenoid Valve Circuit(S) (Front LH Outlet)
- DTC 36: Abnormal Outlet And Suction Solenoid Valve Circuit(S) (Rear RH Outlet)
- DTC 38: Abnormal Outlet And Suction Solenoid Valve Circuit(S) (Rear LH Outlet)
- DTC 63: Abnormal Outlet And Suction Solenoid Valve Circuit(S) (Primary Suction)
- DTC 64: Abnormal Outlet And Suction Solenoid Valve Circuit(S) (Secondary Suction)
- DTC 41: Abnormal VDC Control Module
- DTC 42: Source Voltage Is Abnormal
- DTC 43: Faulty VDCCM - ECM Communication Line
- DTC 44: A Communication With At Control Abnormal
- DTC 45: Control Module Out Of Specification
- DTC 46: Abnormal Voltage Of 5 V Power Supply
- DTC 47: Faulty Can Communication Line
- DTC 48: Faulty ECM - VDCCM Communication Line
- DTC 49: Abnormal Engine Speed Signal
- DTC 51: Abnormal Valve Relay
- DTC 52: Abnormal Motor And/Or Motor Relay
- DTC 71: Abnormal Steering Angle Sensor
- DTC 72: Abnormal Yaw Rate Sensor
- DTC 73: Abnormal Lateral G Sensor
- DTC 74: Abnormal Pressure Sensor
- Diagnostics Chart with Select Monitor
- Notes
- Communication For Initializing Impossible (Select Monitor Communication Failure)
- DTC 21: Front Right Abs Sensor Circuit Open Or Shorted Battery
- DTC 23: Front Left Abs Sensor Circuit Open Or Shorted Battery
- DTC 25: Rear Right Abs Sensor Circuit Open Or Shorted Battery
- DTC 27: Rear Left Abs Sensor Circuit Open Or Shorted Battery
- DTC 22: Front Right Abs Sensor Signal
- DTC 24: Front Left Abs Sensor Signal
- DTC 26: Rear Right Abs Sensor Signal
- DTC 28: Rear Left Abs Sensor Signal
- DTC 29: Any One Of Four Abs Sensor Signal
- DTC 31: Fr Hold Valve Malfunction (Front Right Inlet Valve Malfunction)
- DTC 33: Fl Hold Valve Malfunction (Front Left Inlet Valve Malfunction)
- DTC 35: RR Hold Valve Malfunction (Rear Right Inlet Valve Malfunction)
- DTC 37: RL Hold Valve Malfunction (Rear Left Inlet Valve Malfunction)
- DTC 61: Normal Opening Valve 2 Malfunction (Primary Cut Valve Malfunction)
- DTC 62: Normal Opening Valve 1 Malfunction (Secondary Cut Valve Malfunction)
- DTC 32: Fr Pressure Reducing Valve Malfunction (Front Right Outlet Valve Malfunction)
- DTC 34: Fl Pressure Reducing Valve Malfunction (Front Left Outlet Valve Malfunction)
- DTC 36: RR Pressure Reducing Valve Malfunction (Rear Right Outlet Valve Malfunction)
- DTC 38: RL Pressure Reducing Valve Malfunction (Rear Left Outlet Valve Malfunction)
- DTC 63: Normal Closing Valve 2 Malfunction (Primary Suction Valve Malfunction)
- DTC 64: Normal Closing Valve 1 Malfunction (Secondary Suction Valve Malfunction)
- DTC 41: Electrical Control Module (VDC Control Module Malfunction)
- DTC 42: Power Supply Voltage Low
- DTC 43: AET Communication Line Malfunction
- DTC 43: AEB Communication Line Malfunction
- DTC 43: AEC Communication Line Malfunction
- DTC 44: TCM Communication Circuit
- DTC 45: Incorrect VDC Control Module
- DTC 45: TCM Malfunction Specifications
- DTC 46: Abnormal Voltage Of 5 V Power Supply
- DTC 47: Improper Can Communication
- DTC 48: Improper EAC Communication
- DTC 48: EAS Communication Line Grounding Shorted
- DTC 48: Erroneous Communication From EGI To VDC
- DTC 49: Abnormal Engine Speed Signal
- DTC 51: Valve Relay
- DTC 51: Valve Relay On Failure
- DTC 52: Motor And Motor Relay Off Failure
- DTC 52: Motor And Motor Relay On Failure
- DTC 52: Motor Malfunction
- DTC 71: Steering Angle Sensor Offset Is Too Big
- DTC 71: Change Range Of Steering Angle Sensor Is Too Big
- DTC 71: Steering Angle Sensor Malfunction
- DTC 71: No Signal From Steering Angle Sensor
- DTC 72: Abnormal Yaw Rate Sensor Output
- DTC 72: Voltage Inputted To Yaw Rate Sensor Exceeds Specification
- DTC 72: Abnormal Yaw Rate Sensor Reference Voltage
- DTC 72: Change Range Of Yaw Rate Sensor Signal Is Too Big
- DTC 73: Lateral G Sensor Offset Is Too Big
- DTC 73: Abnormal Lateral G Sensor Output
- DTC 73: Change Range Of Lateral G Sensor Is Too Big
- DTC 73: Excessive Lateral G Sensor Signal
- DTC 73: Voltage Inputted To Lateral G Sensor Exceeds Specification
- DTC 74: Voltage Inputted To Pressure Sensor 1 Exceeds Specification (Primary Pressure Sensor)
- DTC 74: Voltage Inputted To Pressure Sensor 2 Exceeds Specification (Secondary Pressure Sensor)
- DTC 74: Pressure Sensor 1 Offset Is Too Big (Primary Pressure Sensor)
- DTC 74: Pressure Sensor 2 Offset Is Too Big (Secondary Pressure Sensor)
- DTC 74: Differential Pressure Of Pressure Sensor Is Too Big
- General Diagnostic Table
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.